978446342 has 4 divisors (see below), whose sum is σ = 1467669516. Its totient is φ = 489223170.

The previous prime is 978446333. The next prime is 978446351. The reversal of 978446342 is 243644879.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (978446333) and next prime (978446351).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244611584 + ... + 244611587.

It is an arithmetic number, because the mean of its divisors is an integer number (366917379).

Almost surely, 2^978446342 is an apocalyptic number.

978446342 is a deficient number, since it is larger than the sum of its proper divisors (489223174).

978446342 is a wasteful number, since it uses less digits than its factorization.

978446342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489223173.

The product of its digits is 1161216, while the sum is 47.

The square root of 978446342 is about 31280.1269498703. The cubic root of 978446342 is about 992.7632024276.

The spelling of 978446342 in words is "nine hundred seventy-eight million, four hundred forty-six thousand, three hundred forty-two".